Recently I have ironed out QuadPaint and improved lots of things under the hood. So far it is shaping into an awesome and fast retopology sketch tool. Strokes also did allow to add, remove, collapse and split vertices for finer control over the output but is still not exposed to the GUI, I will add it soon. I’m considering also live previews so artists can have instant feedback over stroke changes. More importantly is the possibility to be the base of interesting new tools.
Hope you like it!